The patients history of mental health treatment and hearing voices suggests a psychotic disorder, such as schizophrenia. Therefore, the medication he describes may be a typical antipsychotic (eg, haloperidol, fluphenazine), in which case the patient may have neuroleptic-induced parkinsonism.1 It is necessary to find out whether the patient is taking an antipsychotic agent before a diagnosis of idiopathic Parkinsons disease is made. Referral to a psychiatrist is not necessary because the patient is already receiving mental health treatment. Psychological testing would only be indicated if further evaluation suggests that the patients psychiatric diagnosis is unclear. Referral to an endocrinologist is not indicated in this case.